Web-cutting mechanism



Aug, 7, 1928. 1,679,655

B. M. FINE WEB CUTTING MECHANISM Filed Jan. 19, 1927 2 Sheets-She 1 l W 7 all Aug. 7, 1928. 1,679,655

B. M. FINE WEB CUTTING MECHANISM Filed Jan. 19. 192"! 2 Sheets-Sheet 2 Patented Aug. 7, 1928.

"UNITED sr rss i Lei-79,655

PATE T oF Fics BERNARD 'M. FINE, 0F PHILADELPHIA, PENNSYILVANI'A, ASSIGNOR T0 SANITARY PRODUCTS CORPORATION or AMERICA, 0F 'rHr- AnELrHIA, PENNSYLVANIA, A

CORPORATION OF VIRGINIA.

wEB-on'r'rING MECHANISM.-

Application filed January 19, 1927. Serial No. 162 084.

This invention relates to machines for punching blanks from a web of sheet material, and especially, although not exclusively, to machines for punching blanks from. paper or fibre, stock and simultaneously forming them into plates or similar articles. The invention has for its ob]ect to provide means for removing the scrap or portions of the web left after the blanks are punched therefrom in order to facilitate the handling of the web. The invention is particularly applicable to combined blanking out and forming machines in which the web is fed intermittently and alternately with the operation of the blanking out and forming dies, being held stationary during the latter operation. In such a machine, the dies are :usually given *aninitial movement toward one another to punch out a blank and a further movement in the same direction to :form the blank into an article. When, as is usually the case, one of the com- .plementarydiesjofeach pair isheld stationary and the entire range of movement imparted to the fOtllEI, the web, which'at this [time is held stationary "by the feeding means, is deflected out ofits normal plane and, by reason of its engagement with the stationary die, tends to become torn or distorted. In accordance with the present invention this tendency is avoided by cutting the web transversely, thereby severing the scrap from the unused portion of the web and,

. freeing the latter from the stationary :die.

Also, since the web is cross-cut at each blanking-out operation, the resultingscrap is discharged from the machine in small pieces instead of in the for-m of a continuous web and ;-is-much more easily handled and disposed of. g Y

The foregoing and other objects of the invention, together with means whereby the latter may be carried into ef'l'ect, will best be understood from the following description of a preferred form thereof illustrated inthe accompanying drawings. 7

It will be understood, however, that the particularconstruction described and shown has been chosen for purposes ofexempiification merely, .and that the invention, as de be -otherw ise 'embodied without departi'xre from the spirit and scope thereof.

In said drawings:

' Fig. lis a side elevation of a portion of a die pressembodying the invention.

Fig. 2 is a longitudinal section through the cooperating die members, showing the parts in the position occupied thereby prior to the blanking out operation.

Fig. 3 is a'similar view showing the parts in the positions assumed thereby at the completion of the forming operation.

Fig. 4 is a top plan View of :the upper or movable die member. I

5 .is an enlarged detail section taken substantially on the line 5-6, Fig. 41.

Fig-6 is a top .plan view of the lower or stationary die-member and stripper plate.

Fig. 9' is an enlarged detail plan view, and

prising, adie. block 17 carrying a suitable number of lower die sect-ions 18' with which cooperate complementary die sections carried bynn upper die block 21 secured to the ram 16, said die block 21 and the diesections carriedthereby constituting an upper! 'die member cooperating with. said lower die member. At F are indicated feed rollers as typical of means for feeding a web W of sheet material, such as paper or fibre stock,

into the machine and between the cooperating-die members. It will beunderstood that well known in the art and being therefore omitted herein in order to simplify the disclosure.

The cooperating blanking out and forming dies may be of any suitable form but as herein shown are of the type disclosed and claimed in a prior application, Serial No. 1785. filed January 12, 1925, by Harry E. Ruckert and myself. Accordingly, each section of the lower die member comprises a circular blanking out punch 18 suitably secured in the die plate 17 and having a suitably shaped opening 19 therethrough with which cooperates a forming punch 20 secured to the upper die plate 21 and constituting part of the complementary section of the upper die member. Also secured to the upper die plate 21, as by means of bolts 22 and a suitably apertured clamping plate 23, is an upper blanking out die member 24: having sections shaped to receive and cooperate with the lower blanking out punches 18. The upper blanking out die member 24: cooperates with the blanking out punches of the lower die member 18 to punch blanks B from the web W, while the punches 20 cooperate with the openings 19 in the punches or die sections 18 to form said blanks into articles A. Associated With the lower die member is a stripper plate 25 over which the web W is fed, said stripper plate being shaped substantially to fit the lower die sections 18, being suitably yieldingly supported on the bed by springs 26, as is usual in machines of-this type, and being depressed when the ram 16 descends by fingers-or studs 27 carried by the latter. I

The operation of the mechanism as thus far described is as follows: WVhen the ram 16 rises, the feed rollers F are actuated to advance the web W over the stripper plate 25 and between thedie members. 'When the rain descends, the blanking out die sections 24 cooperate with the blanking out punches 18 to punch circular blanks B from the web W, leaving in said web a transverse series of corresponding holes 0, as shown in Fig. 8. Further downward movement of the ram causes the punches to engage the blanks B, forcing them into and through the openings 19 in the die sections 18, and forming them into articles A as shown in Fig. 3, said articles being of substantially the form shown in Figs. 9 and 10. Simultaneously with the latter movement, the fingers 27 engage the stripper plate and. depress the latter. This causes the adjacentportion of the web N to be deflected out of its normal plane, as shown in Fig. 3.- As the blanking out punches 18 are at this time engaged with the holes C inthe web, and as the rolls F are stationary, this deflection of the web tends to displace and tear or otherwise distort the same. To avoid this, and in accordance with the'present invention, means are provided for cutting the web transversely to remove the scrap S (Fig. 8) re maining after the formation of the holes C, thereby freeing the web from the blanking out punches. Said means as herein shown are as follows:

Carried by the upper blanking out die member 2% are cutters 28 having shanks 29 which are received in suitable openings in said member, said cutters cooperating with correspondingly arranged cutters 80 secured, as by screws 31, in grooves 32 formed in the upper face of the stripper plate 25. The cooperating pairs of cutters 28 and are offset laterally of the web from the centres of the punches and blanking out dies, extend laterally from the latter, and are so located respectively as to cut the web V on lines (Z connecting the web holes C and on lines 6 connecting the outermost holes of the series with the edges of the web. Said cutters, therefore, operate to cut the web transversely at points where the latter is not pierced by the holes C, thereby completely crosscutting said web, severing from the end thereof the scrap S, and freeing said end from the blanking out punches. The arrangement is'such that, concurrently with the cooperation of the blanking out dies 24: with the punches 18, the cutters 28 cooperate with the cutters 30 to shear the web at the points described, this operation occurring just prior to the engagement of the fingers 27 with the stripper plate 25 and the corresponding depression of the latter.

Having thus describedmy' invention, I claim:

1. In a ma chine of the character described, in combination, intermittently operating means for feeding a web of sheet material, a pair of relatively movable cooperating members for punching blanks from said web, means for operating said members while said web is held stationary by said feeding means, and means for cutting said' web transversely at points where the latter is not pierced by the holes from which said blanks are punched to connect said holes and the edges of said web, said cutting means operating before said web has been displaced substantially from the plane in which it normally travels.

2. In'a machine of the character described, in combination, intermittently operating means for feeding a web of sheet material,

a pair of relatively movable" cooperating members for punching blanks from said web, means for operating said members while said web is held stationary by said feeding means, means for cuttingsaid web transversely at points where the latter is not pierced by the holes from which said blanks are punched to connect said holes and the edges of said web, said cutting means operating before saidweb'has been displaced substantially from the plane in which it normally travels, and means for positioning the end of said web in said plane for feeding between said members.

3. In a machine of the character described, incombination, intermittently operating means for feeding a-web of sheet material, a pair of cooperatingdie members for punching blanks from sheet material and forming the blanks into articles, means for moving one of said members successively in the same direction to cut a blank and thereafter shape the same in the course of which the web of sheet material is carried downwardly to surround the other of said members, and means for cutting said web transversely at points Where the latter is not pierced by the holes from which said blanks are punched to connect said holes and the edges of said web, said cutting means operating before said web has been displaced substantially from the plane in which it normally travels.

4. In a machine of the character described, in combination, intermittently operating means for feeding a web of sheet material, a pair of cooperating die members for unching blanks from sheet material and orming the blanks into articles, means for moving one of said members successively in the same direction to cut a blank and thereafter shape the same in thecourse of which the web of sheet material is carried downwardly to surround the other of said members, and means for cutting said web transversely at points where the'latter is not pierced by the holes from which said blanks are punched to connect said holes and the edges of said web, said cutting means operating before said web has been displaced substantially from the plane in which it normally travels, and means for positioning the end of said web in said plane for feeding between said members.

In testimony whereof I afiix my signature.

BERNARD M. FINE. 

